Thanks for the info, I'm new to ford so I don't really know much about them. My ZTS is a DOHC 2.0, I just replaced the factory straw with a 2 1/4 stainless pipe from the flex pipe back, I have ordered a Focus Central header and off-road pipe with the cat. If this Focus is anything like my 10 sec. '97 DOHC all motor neon, this car will eat mustangs for breakfast! Ironicly my neon was t-boned by a Ford Excursion. I will post my upgrades as they performed. I almost in the very near future I will be doing a Kuegler v-8 swap to my Focus. SICK!